libjava/javax/security/sasl/AuthorizeCallback.java

   1 /* AuthorizeCallback.java --
   2    Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.security.sasl;
  40
  41 import javax.security.auth.callback.Callback;
  42
  43 /**
  44  * This callback is used by {@link SaslServer} to determine whether one entity
  45  * (identified by an authenticated authentication ID) can act on behalf of
  46  * another entity (identified by an authorization ID).
  47  */
  48 public class AuthorizeCallback implements Callback
  49 {
  50
  51   // Constants and variables
  52   // -------------------------------------------------------------------------
  53
  54   /** @serial The (authenticated) authentication id to check. */
  55   private String authenticationID = null;
  56
  57   /** @serial The authorization id to check. */
  58   private String authorizationID  = null;
  59
  60   /**
  61    * @serial The id of the authorized entity. If null, the id of the authorized
  62    * entity is authorizationID.
  63    */
  64   private String authorizedID  = null;
  65
  66   /**
  67    * @serial A flag indicating whether the authentication id is allowed to act
  68    * on behalf of the authorization id.
  69    */
  70   private boolean authorized = false;
  71
  72   // Constructor(s)
  73   // -------------------------------------------------------------------------
  74
  75   /**
  76    * Constructs an instance of <code>AuthorizeCallback</code>.
  77    *
  78    * @param authnID the (authenticated) authentication ID.
  79    * @param authzID the authorization ID.
  80    */
  81   public AuthorizeCallback(String authnID, String authzID)
  82   {
  83     super();
  84
  85     this.authenticationID = authnID;
  86     this.authorizationID  = authzID;
  87   }
  88
  89   // Class methods
  90   // -------------------------------------------------------------------------
  91
  92   // Instance methods
  93   // -------------------------------------------------------------------------
  94
  95   /**
  96    * Returns the authentication ID to check.
  97    *
  98    * @return the authentication ID to check
  99    */
 100   public String getAuthenticationID()
 101   {
 102     return authenticationID;
 103   }
 104
 105   /**
 106    * Returns the authorization ID to check.
 107    *
 108    * @return the authorization ID to check.
 109    */
 110   public String getAuthorizationID()
 111   {
 112     return authorizationID;
 113   }
 114
 115   /**
 116    * Determines if the identity represented by authentication ID is allowed to
 117    * act on behalf of the authorization ID.
 118    *
 119    * @return <code>true</code> if authorization is allowed; <code>false</code>
 120    * otherwise.
 121    * @see #setAuthorized(boolean)
 122    * @see #getAuthorizedID()
 123    */
 124   public boolean isAuthorized()
 125   {
 126     return authorized;
 127   }
 128
 129   /**
 130    * Sets if authorization is allowed or not.
 131    *
 132    * @param authorized <code>true</code> if authorization is allowed;
 133    * <code>false</code> otherwise.
 134    * @see #isAuthorized()
 135    * @see #setAuthorizedID(String)
 136    */
 137   public void setAuthorized(boolean authorized)
 138   {
 139     this.authorized = authorized;
 140   }
 141
 142   /**
 143    * Returns the ID of the authorized user.
 144    *
 145    * @return the ID of the authorized user. <code>null</code> means the
 146    * authorization failed.
 147    * @see #setAuthorized(boolean)
 148    * @see #setAuthorizedID(String)
 149    */
 150   public String getAuthorizedID()
 151   {
 152     if (!authorized)
 153       {
 154         return null;
 155       }
 156     return (authorizedID != null ? authorizedID : authorizationID);
 157   }
 158
 159   /**
 160    * Sets the ID of the authorized entity. Called by handler only when the ID
 161    * is different from {@link #getAuthorizationID()}. For example, the ID might
 162    * need to be canonicalized for the environment in which it will be used.
 163    *
 164    * @see #setAuthorized(boolean)
 165    * @see #getAuthorizedID()
 166    */
 167   public void setAuthorizedID(String id)
 168   {
 169     this.authorizedID = id;
 170   }
 171 }